SI9150 Datasheet, PDF (2/5 Pages) Vishay Siliconix – Synchronous Buck Converter Controller

Si9150
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND.
V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
I_SENSE Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −2 V to V_DD +2 V
All Other Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to V_DD + 0.3 V
P-Gate, N-Gate Continuous Source/Sink Current . . . . . . . . . . . . . . . . 50 mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 125_C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
Power Dissipation (Package)a
14-Pin SOIC (Y Suffix)^b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mW
Thermal Impedance (Q_JA)
14-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140_C/W
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.2 mW/_C.
SPECIFICATIONS^a
Parameter
Reference
Output Voltage
Oscillator
Maximum Frequency
Initial Accuracy
Oscillator Ramp Amplitude
Temperature Stability^d
Error Amplifier
Input BIAS Current
Open Loop Voltage Gain^d
Offset Voltage
Unity Gain Bandwidth^d
Output Current
Power Supply Rejection
Protection
Current Limit
Threshold Voltage
Current Limit
Delay to Output^d
Undervoltage
Lockout Voltage
Undervoltage Hysteresis
Softstart Pull-Up Current
Supply
Supply Current
(Enable Low)
Supply Current
(Enable High)
Supply Current (STBY Low)
Symbol
Test Conditions
Unless Otherwise Specified
6.0 v V_DD v 16.5 V
Limits
C Suffix 0 to 70_C
Min^b Typ^c Max^b
Limits
D Suffix −40 to 85_C
Min^b Typ^c Max^b
Unit
V_REF
T_A = 25_C
Measured at Feedback^e Pin 5
T_MIN to T_MAXd
2.45
2.50
2.55 2.45
2.50
2.55
V
2.425 2.500 2.575 2.40 2.500 2.60
f_MAX
f_OSC
V_OSC
f_TEMP
C_OSC =94.3 pF, R_OSC = 28.7 kW
T_A = 25_C^f
C_OSC =212 pF, R_OSC = 41.2 kW
T_A = 25_C^f
T_A = 25_C, 100 kHz
V_DD = 10 V, T_MIN to T_MAX
255
300
345
255
300
345
kHz
85
100
115
85
100
115
2.05
2.65
2.85 2.05
2.65
2.85
V
−5
"3
+5
−6
"4
+6
%
I_B
A_VOL
V_OS
BW
I_OUT
PSRR
V_FB = V_REF
Source, V_COMP = 2.50 V
Sink, V_COMP = 1.0 V
25
500
25
750
nA
60
72
58
72
dB
10
25
10
30
mV
1
1.5
1
1.5
MHz
−0.30 −0.20
−0.30 −0.15
mA
1
2.5
0.9
2.5
50
70
48
70
dB
V_CL
t_d
V_UVLO
V_HYS
I_SS
I_OFF
I_CC
I_SB
T_A = 25_C, V_DD = 10 V
T_A = 25_C
Upper Threshold
C_L = 0 pF, f_OSC = 100 kHz
V_DD = 10 V
0.43
0.49
0.55 0.43
0.49
0.55
V
500
1000
500
1000
ns
5.4
5.7
6.0
5.38
5.7
6.01
V
0.10
0.17
0.25 0.10
0.17
0.26
20
20
mA
60
100
2.2
3.0
300
500
60
100
mA
2.2
3.0
mA
300
550
mA
www.vishay.com
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Document Number: 70020
S-40752—Rev. F, 19-Apr-04